<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>19_iframe-指定表单打开的位置</title>
    </head>
    <body>
        <form action="http://www.taobao.com" target="guigu">

            <button>按钮</button>
        </form>


        <iframe name="guigu"></iframe>

    </body>
</html>